package com.itheima.reggie.common;
//基于ThreadLocal封装的工具类，用来保存和获取当前登录用户id
public class BaseContext {
    //threadlocal会为每个线程单独创建一个单独的空间
    private static final ThreadLocal<Long> threadLocal = new ThreadLocal<>();
    /**
     * 设置值
     * @param id
     */
    //将当前登录用户id存入ThreadLocal中
    public static void setCurrentId(Long id){
        threadLocal.set(id);
    }
    /**
     * 获取值
     * @return
     */
    //从ThreadLocal中获取当前登录用户的id
    public static Long getCurrentId(){
        return threadLocal.get();
    }

    //此方法会释放threadLocal的空间，避免后期因代码执行次数过多，导致内存溢出问题的出现
    public static void removeCurrentId(){
        threadLocal.remove();
    }
}
